Heatwise Heating Blog

For all the latest news and updates

Guide how to re-pressurise boiler

Expert Tutorial On How To Re-Pressurise Your Boiler

Posted on |

Follow this Step-by-Step Tutorial on How to Re-pressurise Boiler

Bleeding a radiator releases trapped air inside, which helps your heating system run more efficiently. This easy-to-follow guide will walk you through safely bleeding your radiators and show you how to re-pressurise your boiler. If you have any doubts or concerns, it’s always best to consult our professional team for advice.

How to re-pressurise boiler

Keyless Filling Link

  • Check the pressure gauge on your boiler — if the needle is below 1 bar, it’s time to top up the system.
  • Pull down the blue lever to start adding water.
  • Keep an eye on the pressure gauge as the system fills.
  • Once the needle reaches between 1 and 1.5 bar, let go of the blue lever to stop filling.

    •  
    Keyless filling link guide

    Integral keyed filling link

    First, find your filling key and follow these steps to re-pressurise your boiler:

  • Push the filling key firmly into the filling link, making sure the arrow on the key lines up with the open padlock symbol.
  • Turn the key to the right until it stops — it should lock in place, with the arrow now pointing to the closed padlock symbol. This connects the two parts of the filling loop.
  • Turn the white knob to the left to let water start filling the system.
  • Keep an eye on the pressure gauge on your boiler’s front panel — once it reaches between 1 and 1.5 bar (zone A), turn the white knob back to the right to close the valve. Be careful not to overtighten.
  • Finally, turn the filling key to the left until it stops, so the arrow points back to the open padlock symbol, then pull the key straight down to remove it. Don’t forget to store the key back in the bottom panel!

    •  
    Integral keyed filling link

    Is your boiler lose pressure daily?

    If your boiler keeps losing pressure and you find yourself topping it up often, that’s definitely not normal. Before you start hunting for leaks in your system, there’s an important step: check your pressure gauge while your heating is on.

  • Does the pressure gauge spike to a high reading before your heating begins to cool down?
  • Can you spot any copper pipes on external walls dripping or spraying hot water?

    • If you notice either of these signs, it’s likely that the expansion vessel inside your boiler needs to be recharged or possibly replaced. This definitely must be carried out by a Gas Safe registered engineer, This issue is quite common across all boiler brands. Regular boiler servicing should include checking and recharging the expansion vessel, so having your boiler serviced could easily fix this problem.

    Get your boiler serviced by Heatwise Heating, Get in touch with our friendly team.

    Heatwise Heating
       GDPR Cookie Compliance
    Privacy Overview

    This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.